Add Fabric Manager Shared NVSwitch virtualization model support #538
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The changes include:
- add the `FABRIC_MANAGER_FABRIC_MODE` env var that configures FM with
either full-passthrough (0) or shared-nvswitch (1) fabric mode. It
defaults to 0.
- when fabric manager mode is set to 0 no changes to the flow, i.e.
execute the fabric manager daemon with its default configuration.
- when fabric manager mode is set to 1:
- edit the fabric manager configuration file and set `FABRIC_MODE=1`.
- persist mapping of physical GPU module IDs to their PCIe address by
creating a JSON file on disk (the physical GPU module IDs are
available through nvidia-smi).
- disable `nvidia-persistenced`, as the GPU devices should be
unbound from the NVIDIA driver and bound to vfio-pci (a step
executed by the vfio-manager).
Signed-off-by: Michail Resvanis <mresvani@redhat.com>
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This PR adds Fabric Manager (FM) Shared NVSwitch virtualization model support when NVSwitch devices are detected and the newly introduced
FABRIC_MANAGER_FABRIC_MODEenv var is set to1(shared-nvswitch).No changes introduced when
FABRIC_MANAGER_FABRIC_MODE=0(default FM mode - full-passthrough), which is the current flow when NVSwitch devices are detected.Relates to: NVIDIA/gpu-operator#2045
Changes
FABRIC_MANAGER_FABRIC_MODEto control fabric managerFABRIC_MODE(defaults to0forfull-passthrough,1forshared-nvswitch).nvidia-smi.nvidia-persistencedsince GPU devices should be bound tovfio-pciby thevfio-managerin the next step.